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spatstat.geom 3.0-5
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spatstat.random 3.1-3
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spatstat.explore 3.0-6
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spatstat.model 3.1-2
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spatstat.linnet 3.0-4
spatstat 3.0-3
For an introduction to spatstat, type 'beginner'
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Loading required package: maptools
Checking rgeos availability: FALSE
Please note that 'maptools' will be retired during 2023,
plan transition at your earliest convenience;
some functionality will be moved to 'sp'.
Note: when rgeos is not available, polygon geometry computations in maptools depend on gpclib,
which has a restricted licence. It is disabled by default;
to enable gpclib, type gpclibPermit()
Loading required package: rgdal
Please note that rgdal will be retired during 2023,
plan transition to sf/stars/terra functions using GDAL and PROJ
at your earliest convenience.
See https://r-spatial.org/r/2022/04/12/evolution.html and https://github.com/r-spatial/evolution
rgdal: version: 1.6-4, (SVN revision 1196)
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Loaded PROJ runtime: Rel. 8.2.1, January 1st, 2022, [PJ_VERSION: 821]
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Linking to sp version:1.6-0
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Simple feature collection with 0 features and 1 field
Bounding box: xmin: NA ymin: NA xmax: NA ymax: NA
Geodetic CRS: New Beijing
[1] neighbourhood geometry
<0 rows> (or 0-length row.names)
beforecovid_sf <-st_as_sf(beforecovid, # our coordinates are the longitude and latitudecoords =c("longitude", "latitude"), # the geographical features are in longitude & latitude, in decimals# as such, WGS84 is the most appropriate coordinates systemcrs =4326) %>%st_transform(crs=4555)#afterwards, we transform it to SVY21, our desired CRS
aftercovid_sf <-st_as_sf(aftercovid, # our coordinates are the longitude and latitudecoords =c("longitude", "latitude"), # the geographical features are in longitude & latitude, in decimals# as such, WGS84 is the most appropriate coordinates systemcrs =4326) %>%st_transform(crs=4555)
Simple feature collection with 0 features and 2 fields
Bounding box: xmin: NA ymin: NA xmax: NA ymax: NA
Geodetic CRS: New Beijing
[1] osm_id type geometry
<0 rows> (or 0-length row.names)
